本推荐规程为API 6D定义的管道应用中通常使用的钢球、止回阀、闸阀和旋塞阀的维修和再制造提供了指南。本推荐规程涵盖最终用户（业主）阀门的维修或再制造，以便在业主的生产应用中继续使用。它不包括用于转售的旧阀门或剩余阀门的维修或再制造。维修或再制造的阀门可能不符合API 6D和/或新阀门的OEM原始产品定义（OPD）。业主负责按照本文件正确使用维修或再制造的阀门。现场维修不在本文件范围内。

This recommended practice provides guidelines for the repair and remanufacture of steel ball, check, gate, and plug valves normally used in pipeline applications, as defined by API 6D.This recommended practice covers repair or remanufacturing of end user's (owner's) valves for continued service in the owner's production applications. It does not cover repair or remanufacture of used or surplus valves intended for resale.Repaired or remanufactured valves may not meet API 6D and/or the OEM original product definition (OPD) for new valves.The owner is responsible for the correct application of valves repaired or remanufactured per this document.Field repair is outside the scope of this document.